Syringe



INVEN'ToR.

ATTORNEY.

A. E. SMITH SYRINGE Filed Feb. l5. 1927 ARTHUR E. SMITH `lune 25',192.9..

Patented June 25, 1929.

UNITED STATES ARTHUR ESMITH, OF LOS NGELES, CALIFORNIA.

SYRINGE.

Application filed February 15, 1927. Serial No. 168,295.

This invention relates to syringes which are adapted tor use withampules.

The general object ot this invention is to provide a syringe in which anampule may be loaded in a syringe and automatically correctly positionedwhen the movable member oi" the syringe is arranged in operativeposition.

Another object of this invention is to provide a syringey having amovable member adapted to receive the ampule and provided with meanswhich is adapted to expel the contents ot the ampule.

Still another object oi. this invention is to provide a syringe whereinnovel means is provided for forming a luid tight joint between a portionof the syringe and an ampule to prevent .leakage when the syringe isoperated to expel the contents of the ampule.

Other objects and advantages of this invention will be apparent from thefollowingdescription taken in eonnectionwith the aecoinpanying drawingswherein Fig. 1 is a central vertical section of a syringe embodying thefeatures of my invention.

Fig. 2 is an extended view of my improved syringe.

Fig. 3 is a cross section taken on line 3 3 oit lii 1.

Fig. l is a bottom plan view of the ampule holding and plunger sectionof the syringe.

F ig. 5 is a top plan view of the main body or barrel of the syringe andF ig. 6 is a sectional detail view of an ampule which may be used inconnection with my improved syringe.

Referring to the drawing by reference characters Vl: have indicated myimproved syringe generallyat 10. The syringe coinp -ses a barrel or body11 having a cross bar 12 adjacent its top and having its lower endinternally threaded as at 13. The end of the `barrel is chamt'eredoutwardly as at 111, and `the main portion ot the barrel is providedwith spaced elongated apertures 11', the function ot which will beexplained hereinafter.

A tip 15 is in threaded engagement with the lower end of the barrel 12and terminates in a reduced externally threaded portion 16. The tip 15is provided with a conical recess 17 and has a hollow dischargetube 18soldered or otherwise secured in the reduced end portion 16. The tip 15is also provided at its upper end with internal threads as shown at 19.

`readily A cone 2O is disposed in the conical recess 17 and tightlyengages the discharge tube 18. The cone 2() is preferably made of rubkberend is provided with a conical recess 21. Adjacent the top of therubber cone 2O on the surface of the recess 21, a circular ridge or bead22 is provided. The rubber cone 20 is adapted to be maintained inposition in the tip 15 by a ring 23 which is externally threaded toengage the internal threads 19 of the tip. A hypodermic needle 25 havinga hub portion 2G is secured to the tip 15 by screw threaded engagementwith the reduced end 16 of the tip.

An ampu le holding and centering member 27 is adapted to be slidablymounted in the body. rlhe ampule holder 27 comprises a tubular body 28having spaced elongated apertu res 2J therein and having a handle member3() which includes a hub portion 31 threaded with the end oif 'the body23.

rlhe end surface of the tubular body 23 is ehan'l'tered outwardly as at32. A plunger rod. 33 secured in` the hub portion 31 ot the handle 30.This plunger' rod 33 is provided at its lower end with an enlarged head34.

An ampule which maybe used in connection with my improved syringe isshown in F i g. G, indicated generally by the numeral 35. This ampule ispreferably made of glass and comprises a tubular body 36 having arestricted end portion 37 which is closed at the bottom by a tip 38. Thetip 33 is rendered removable from the portion 37 by providing an etched,scored, or molded notch 39 completely aroundthe restricted portion 3 Thelarge end ot the tubular body 36 is closed by a stopper 10 which islmelerably made of rubber and which is slidable in the body 36. Theouter end edge oit the body36 is preferably beveled as at 4:1.

l/Vhen an operator desires to use my device the ampule holder 27 isremoved .trom the body 1 1 et the syringe. The tip of the ampule isbroken and the ampule is inserted in barrel or holder 11 until the endof the ampule engages the cone 2O and the bead 22 engages the ampule.The neck 37 is fitted over the tube 13 as shown in Fig. 1.

rlhe centering member 27 is then inserted in the barrel. This membertits snugly within the tubular body of the barrel and as the `member 27slides in the barrel the bevel 32 engages the bevel 41 on the end of theampule and centers the ampule.

As the movement of the member 27 continues the plunger head 34 forcesthe rubber stopper 4() toward the restricted portion 37 and thus forcesthe contents of the ampule into the discharge tube 18 and into thehypodermie needle 25.

As pressure is applied to the stopper the neck 37 of the ampule will beforced into tight engagement with the surface of the conical part 21 ofthe con`e 20 to thereby create a fluid tight joint between the two. Alsoas the neck 37v of the ampule is forced downward against the side wallsof the conical recess 21 o the cone 2O the pressure against the sidewalls will tend to force the bead 22 to grip the sides ofthe neck 37 ofthe ampule and thus form another fluid tight joint. This willpreventleakage, if for any reason there is a defect in the rubber coneor the fractured end of the ampule' which might allow the ampulecontents to leak past the first mentioned joint formed by the contact ofthe fractured end of the ampule with the side walls of the conicalrecess in the cone 20.

The elongated apertures 11 in the syringe body 11 and the apertures 29in the ampule holder 27 form viewing apertures through which theoperator may observe to what extent the contents of the ampule has beenremoved.

'From the foregoing description it will be apparent that I have provideda syringe embodying novel features and which may be readily loaded,easily operatedV and which is highly efficient in use.

What I claim is:

1. A syringe" of the character described comprising a barrel, means insaid barrel for engaging the end part of an ampule and a member slidablein said barrel, said member having means rigid thereon for centering anampule and also having means rigid thereon movable within an ampule forengaging a stopper in the ampule.

2. A syringe adapted to receive an ampule and having means at itsdischarge end to make fluid tight engagement with the end portion 'of anampule, a member movable in said syringe, saidmember including a partadapted to engage the ampule to center it and a second part immovablerelative to the first part and adapted to fit within the ampule` 3. In asyringe adapted to expel the contents of an ampule, a barrel, an ampuleholder adapted to slide within said barrel, said ampule holder includinga handle having a hollow tubular body rigid thereon adapted to engagethe outer` surface of an ampule, and a lplunger rigid on the handle andarranged within the hollow of said body, said plunger being adapted tolit within an ampule.

'4. In combination 1n a syringe, a barrel, an ampule and an operatingmember, said barrel comprising an elongated hollow body, said ampuleincluding a hollow body having means movable therein to force thecontents out of the ampule and said operating member including a handleportion having a hollow sleeve thereon, said sleeve being adapted toslide within the barrel to center the ampule in the barrel, saidoperating member including a plunger fixed with respect to said sleeveand movable into said ampule to engage said movable means and move saidmeans.

5. A syringe adapted to expel the contents of an ampule comprising abarrel, an ampule holder adapted to slideI within said barrel, saidholder comprising a hollow tubular body having one end beveled outward,a handle on said ampule holder, and a plunger rod within the hollow ofsaid body, and engaging an end of ampule holder, said hollow tubularbody of said ampule holder bein" of a size to fit over the outside of anampule wliile said plunger engages a stopper to expel the contents ofsaid ampule.

6. In combination in a syringe, a barrel, an ampule and an operatingmember, said barrel comprising an elongated hollow body having means atone end for engaging an end of the ampule, said ampule including ahollow body having a stopper movable therein to force the contents outof the ampule, said operating member including a handle portion havingan open ended hollow sleeve thereon adapted to slide within the barrel,means on said sleeve adapted to center the ampule in the barrel, saidoperating member including a lplunger rigid thereon and movable intosaid ampule to engage said stopper and move it to force the contentsfrom said ampule.

7. In combination in a syringe, a barrel, an ampule and an operatingmember, said barrel comprising an elongated hollow body having means atone end for engaging an end of the ampule, said ampule including ahollow body having a stopper movable therein to yforce the contents outof the ampule and said operating member including a handle portionhaving an open ended hollow sleeve thereon, said sleeve having achamfered lower end adapted to slide within the barrel, said sleevehaving an internal diameter slightly greater than the outside diameterof the ampule, said sleeve being adapted to center the am )ule in thebarrel, said operating meinber including a plunger fixed with respect tosaid sleeve and movable into said am Jule to engage said stopper andmove it to force the contents from said ampule.

In testimony whereof, I hereunto ailix my signature.

ARTHUR E. SMITH.

